Trimming machine



Aug. 30, 1949., vQM. LENG 2,480,747

TRIMMING MACHINE Filed July 6, 1946 2 Sheets-$heet 1 qLL g 5 1 INVENTOR.

- VA LEN T/N LEA/G A TT'OENEK Aug. 30, 1949.

v M. LENG TRIMMING MACHINE 2 Sheets-Sheet 2 Filed July 6, 1946 INVENTOR. VALENT/N M LENG ATTOENEX Patented Aug. 30, 1949 UNITED stuns TE T' OFFICE This. invention relates to a machinei r trimmingmr edging: the ends and side edges .of rectangular shaped panels m de from wood sha excelsior or. a like material. which is cempressed: ands-bonded with hydraulics-cement.

The. nanelslahever fenred to are fully sclosed in my CQ-Dfifldillg application entitled Fibers li and nanel. andmethod. oi making: same, filed Au ust. .13, 19 93,. $erial Number 6l0,67.'7, which beenaband ned. vBriefly stated, the panels .disclosedin hea ove applica ion re. made, from encelsion-eoated withhPlor-tland r hydraulic .cement, The QQated excelsiei is placed a mold andic nspress:d,v and. remain nd r. eqmpressien until. the ceme has taken an ini ial set. The ,eomp essed. material panel. .fQrm is then .r movedand submitted to a curinsactisn u til the eeinent is epmpletely set.

Inactual p e ice he molds emploxedare mad 91 wee-d, and-as heyare subi eted to heavy pressnre and mush hand ing, the p nels, when removedimm 1119 115,. are notalwaysexact y square and the edges are e ten m s and bes des that ennpnardprojecting fin is termed o h upper shriase oi. the panel d ring the molding Qnera tion. This nnis fpitmedetthe side and end edges at the panel and cempletely surrounds. the same. Ihena ls thus. regnire bo h tnimmin e to square them and. removal of'the .fin: befoizethey a e needy I911 the m rk t- The object of the present invention is generally to ,pmy e a mach ne Whish wi l remove. .theun watdly prqt ting .finandiatt esame time square d 2 .117 or trim the side and end edges of the panels.

The machine is ,shown by way ofil'lustrafion in the accompanying drawings in which:

Fig. 1 is a perspective view of the machine;

Fig, 2 is an enlarg Q mn ta en Qnline H-*II of Fig. '1;

i '31s, an nlarg d side e t o Qt the safety lever;

Fig.4 is an end View of the same;

'Figs an n rged side elevat nv of the spr cket gear and chain. me hanism .whesehy po er s transm tted t the. feed rollers; s

lie 6. an end View nartially in. .sedtiohQf Ilia-,5; V a V Fig 7. is an ehl nged, view in .seetinn showing the cutter head spindle drive; 7

ig- 8 ansenlarkged view of one M the cutt r heads; 7 I

Fi 9 is anenlaltged emss-s ctinnl taken an line Iii-13m Fla 8,; and

Fig, llllsa seetion .of time end of. a. panel,

Reiernine to, the drawings: detail, andnantisn-larlv Fig. :1, A indicates an eleneateclmain frame havin a pair of" lateral extending side frames such s indicated at B and C. Suitably ecured to the; pper sinfeee ofeach side; frame is an angle iron guide rail 4 and secured to the inner :face Q each side frame is a rack bar 5. .SuppQrted" and sliiiahlv mounted between the snide .rails- 9+4 is a misher head 16;. and ioiimaled at each end of the pusherhead isna. gear 1 (see lies. 3 d s). Qi5:g:efl I:ih ll; 2 Sl iS th sn k bars. 5- 5; and, the by "maintains the pu her head in a nesition at =;r: eht angles to the gllldfi mails While heinefed-vaneed or; retracted as will heiieinaiter lee-described.

The, panelste be squared and trimmed else usually. longer than their-Wi th. Thatris, they are rectangular in shape for instance-tour fleet wide and eightfeet lone, Thesepanels are pi s done: at a time with, one side edge -aehis the-frqnt edge ea f'the pusher head-and when so placed anesupported by a pan: of arms 513- 519 teeming a part of thepusher head. "The pposite ends of the naneleh a e the ide r ils 4 -e and as such the pan fully supported-sand guided during the first t1? m ne on rat e hereinafte e-bedescxibed. v

Snnmrted i he meinf me are t e se ter heads genenally indicated at .1, 2 and These cutter heads wi l here n fter e r ferred l-as the firstssecon and third n med cutter nead T cutter heads are identical in construetien, hence thedescriptionnf onewi-llsu-ffice. V

A entter head (see Figs. 7 and 8) consists of a ventieally disnesedspindle 8 supported in a near ing 9 and driven from an Glee-trig motor 4 .9,. Suitably secured on the upper end 01 the spindle is h ad menihei' l which carries a plurality ef L d-daily extending cutter blades 12. The outer ends, of the blades terminate in cutting edge which ai e vertical-1d disposed with relation to the vfil'lligalfidge; 5.3; of a panel such as indicated at Dband: as the head ar y ng; the cutter bla es xotates at speed when cutting, it isobvlouS that the edge 13 a panel will be cut as indicated at. 1341 (see 8,) when the pane is fe through theculzters insthe dlrection of the arse-xv,

It Wasnre 1eiis.1y tetes that a fin is was cl es vel ped or iQrnied on the u persurfaceedges Q1 a panel. dulling the moldi g operati n; see gt 1.0) andthat it isv esshntiel that this finlhe- -e moved in order to previde a finishedpanet; lie ascemnlish this: a seeend head member 15- is ser .Q ed on thespindle shove the; head ll. This s e h h ad s. mended with two itadielly dis posed cutter arms l8 (see Figs. 7, 8 and 9). The cutter arms present a flat bottom surface H which is disposed parallel to the upper or fin side surface of the panel to be out and trimmed. Each cutter arm presents a wedge-shaped cutting edge I8 and this edge is curved as shown at I9 in Fig. 8 through the length of the cutter, hence as each blade sweeps across the upper surface of a panel, a draw or slicing cut is produced and the fin I 4 is readily removed. This is done at the same time that the cutters I2 cut or trim the vertical edge I3 as both sets of cutter blades are mounted on the same spindle.

It was previously stated that th panel was composed of excelsior bonded with Portland or like cement. Cement is an abrasive material, hence as the flat bottom surface I] of each cutter arm I6 sweeps across the surface edge of a panel, these lower flat surfaces are subjected to the abrasive action of the cement thereby gradually but slowly subjecting these surfaces to a grinding action which is depended upon to automatically maintain the cutting edges I8 in a sharpened condition. That is, as the surface I! (see Fig. 9) is ground away by the abrasive, it continuously sharpens the edges Hi.

In actual practice a panel to be trimmed is placed on the arm 61) (see Fig. 1) with one side edge of the panel in engagement with the front edge 6a of the pusher head 6. When so positioned, the ends of the panel will be disposed between the guide rails 4 and will be guided thereby. An operator standing between the side frames B and C will, after the panel has been positioned, release a lever 20 (see Figs. 3 and 4) and then grasp one or another of the: handles indicated at 2| and push the pusher head and panel in a direction toward the elongated main frame A. In doing so the end edges of the panel will pass between the cutter heads I and 2. The blades I2 on the lower cutter heads will thus cut and trim the end edges of the panel while the upper cutter blades I6 will trim, out and remove the fins I4. One or more pressure-applying rollers such as shown at 22 (see Figs. 1 and 2) may be positioned just ahead of the cutter heads I and 2 so as to hold the panel down in proper position while it is passing between the cutter heads. After th end edges have been cut and trimmed oif, one end of the panel will align with a second pusher head indicated at 25. This is actuated by a foot treadle indicated at 26, said foot treadle being connected to the pusher 26 by a cable 21 passing over guide pulleys 28. When the foot treadle is depressed, the panel will immediately start to move in the direction of arrow b, that is on a line along the longitudinal axis of the main frame A and as such enters between the cutter heads 2 and 3, and just as the cutting operation starts, the front end of the panel enters between two power driven feed rollers indicated at 30 and 3| which are driven from an electric motor 32 through the chain and sprocket drive generally shown in Fig. 5, and once the power driven feed rollers engage the panel, the operator can release the foot treadle and return the pusher head 6 to normal position where the next panel may be placed in position. The power driven rollers 30 and 3| are continuously driven and while the panel passes between the cutter heads 2 and 3, known as the second and third named cutter heads, the side edges of the panel will be out and trimmed and the fins removed, the finished panel finally discharging at the point indicated at 40 from where they may be removed one by one in any suitable manner. In actual operation the panels actually made are usually four feet wide and eight feet long, and are usually either one or two inches in thickness. It is for this reason that the upper power driven feed roller 30 is provided with a screw actuated adjusting head 45 so that the spacing between it and the lower power driven roller 4i may be adjusted either to a one or two inch panel. The cutter head I I is similarly (iivided into two sections as shown by the line Ila which passes through the cutter head in Fig. 7. Each head II is one inch in thickness, thus where two of them are placed, one on top of the other as shown in Fig. 7, a two inch thick panel is taken care of, while if one inch panels are to be handled, one head will be removed but the upper head will, of course, always be used whether two or one inch panels are being handled. The handles indicated at 2| are nothing more or less than a shaft which supports a plurality of rollers 2Ia. The spaces between the rollers thus function as handles. The rollers serve the function of supporting the panel to be trimmed while it is being shoved across the head to be placed in position and thereby reduce the work or labor on the part of the operator. The lever 20 is pivoted on the shaft 2|. It rides back and forth on the frame with the pusher head as this is advanced or re-- tracted by the operator but when the pusher head is fully retracted to receive a new panel, the hook-shaped end 20a of the lever drops down over the end of the frame, and as such secures the pusher head against being accidently advanced while the panel is resting on the rollers and while it is being positioned. After the panel has been positioned in front of the pusher head, the operator merely lifts the hook-shapedend of the lever clear of the frame and at the same time pushes on the pusher head. The moment the pusher head is advanced an inch or two, the lever may be dropped and both hands of the operator are then free to operate the pusher head, and While this and other features of the invention have been more or less specifically described and illustrated it should be understood that changes may be resorted to within the scope of the appended claims and that the materials and finish of the several parts employed may be such as the experience or judgment of the manufacturer may dictate or varying conditions or usesmay demand.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a machine of the character described, a frame adapted to receive and support a rectangular shaped panel, a power driven rotary cutter on the frame for cutting and trimming one end edge of the panel, a second power driven rotary cutter on the frame for cutting and trimming the other end and one side edge of the panel, a third power driven rotary cutter on the frame for cutting and trimming the other side edge of the panel, means for moving the panel in one direction between the first and second named cutters to cut and trim both ends of the panel simultaneously, and means for moving the panel after passage between said cutters towards and between the second and third named cutters to simultaneously cut and trim both side edges of the panel.

2. In a machine of the character described, a main elongated frame, a side frame extending laterally from said main frame, a first and a sec-. ond power driven rotary cutter on the main frame, means on the side frame for receiving and supporting a four-sided panel, means on said side frame for moving the panel between the T0- tary cutters to trim a pair of opposed side edges of the panel and onto said main frame, a third rotary cutter on the main frame, and means on said main frame for moving the panel longitudinally of the main frame and between the second and third named rotary cutters to trim the other pair of opposed side edges of the panel.

3. In a machine of the character described, a main elongated frame, a side frame extending laterally from said main frame, a first and a second power driven rotary cutter on the main frame, means on the side frame for receiving and supporting a four-sided panel, means on said side frame for moving the panel between th rotary cutters to trim a pair of opposed side edges of the panel and onto said main frame, a third rotary cutter on the main frame, means for moving the panel longitudinally of the main frame and between the second and third named rotary cutters to trim the other pair of opposed side edges of the panel, a first and a second rotary surface cutter cooperating with the first and secand named rotary cutters to trim the surface edges of the panel while the first pair of side edges are being trimmed, and a third rotary surface cutter cooperating With the third named rotary cutter and with the second named surface cutter to trim the other surface edges of the panel while the second pair of side edges are being trimmed.

4. In a machine of the character described, a main elongated frame, a side frame extending laterally from said main frame, a first and a second power driven spindle journaled in th main frame, an edging cutter and a surface edge outter secured on each spindle, means on the side frame for receiving and supporting a four-sided panel, means for moving the panel between the cutters to trim two side and surface edges of the panel and onto the main frame, a third spindle journaled on the main frame, an edging cutter and a surface cutter secured on said spindle, and means for moving the panel longitudinally of the main frame and between the second and third named spindles to trim the other two side and surface edges of the panel.

5. In a machine of the character described, a frame adapted to receive and support a foursided panel, a power driven rotary spindle journaled on the frame, an edging and a surface edge cutter secured on said spindle, a second power driven spindle mounted on the frame, an edging cutter and a surface edge cutter secured on said spindle, a third power driven rotary spindle on the frame, an edging cutter and a surface edge cutter secured on said spindle, means for moving the panel in one direction between the first and second named cutters to cut and trim two side and surface edges of the panel simultaneously, and means for moving the panel after passage between said cutters towards and between the second and third cutters to simultaneously cut and trim the other two side and surface edges of the panel.

6. In a machine of the character described, a compound cutter for cutting one vertical edge and the adjacent surface edge of a panel, said cutter comprising a power driven spindle, a head member secured thereon, a plurality of radially disposed cutter blades secured in said head and extending outwardly therefrom, the outer ends of said blades presenting vertical cutting edges to out and trim the vertical side and end edges of the panel, a second head member secured on the spindle on top of the first named head, a plurality of radially extending cutter blades on said second-named head, said blades presenting lower fiat surfaces engageable with the surface edges of the panel and disposed parallel to the surface of the panel, and a wedge-shaped cutting edge on each blade to cut and trim the surface edges of the panel.

7. In a machine of the character described, a compound cutter for cutting one vertical edge and the adjacent surface edge of a panel, said cutter comprising a power driven spindle, a head member secured thereon, a plurality of radially disposed cutter blades secured in said nead and extending outwardly therefrom, the outer ends of said blades presenting vertical cutting edges to cut and trim the vertical side and end edges of the panel, a second head member secured on the spindle on top of the first named head, a plurality of radially extending cutter blades on said second-named head, said blades presenting lower flat surfaces engageable with the surface edges of the panel and disposed parallel to the surface of the panel, a wedge-shaped cutting edge on each blade to cut and trim the surface edges of the panel, and said wedge-shaped edges being disposed on a curve to produce a slicing cut.

VALENTIN M. LENG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Germany July 6, 1918 Number Number 

